you said that older brother, tamerlan charged police officers? >> yes, he did. at one point he ran toward the police and tried to go across the road and a police officer went out and grabbed him and took him to the ground. >> so the police had them corner and the older one got out of the car. >> i couldn't see if they were in the car or not, but -- >> they said they were throwing the explosives out of the car. >> i just saw the explosives going off, and i could not see him until he came into my vehicle. >> so he gets out of the vehicle and charges the police officers, and they take him down and they are trying to handcuff him on the ground and then what happened? >> at that point, a black suv came out from behind the house where they were and i couldn't see him, and ran over to his brother. >> do you believe that the younger one was in the suv? >> yes. >> and dzhokhar was in the suv driving and ran over his own brother? >> yes. >> you believe his killed his own brother? >> i believe so, yes. >> what happened with the -- when he drove towards them? >> there were